1. 下载安装
官网下载地址:Apache Kafka
下载对应的文件
上传到服务器上,解压
tar-xzf kafka_2.13-3.7.0.tgz
目录结果如下
├── bin
│ └── windows
├── config
│ └── kraft
├── libs
├── licenses
└── site-docs
官方文档:Apache Kafka
kafka 有两种启动方式,ZooKeeper 和 KRaft,这里采用 KRaft 的方式,使用 kraft 目录下的配置文件
config
├── connect-console-sink.properties
├── connect-console-source.properties
├── connect-distributed.properties
├── connect-file-sink.properties
├── connect-file-source.properties
├── connect-log4j.properties
├── connect-mirror-maker.properties
├── connect-standalone.properties
├── consumer.properties
├── kraft
│ ├── broker.properties
│ ├── controller.properties
│ └── server.properties
├── log4j.properties
├── producer.properties
├── server.properties
├── tools-log4j.properties
├── trogdor.conf
└── zookeeper.properties
修改
server.properties
文件
process.roles
:KRaft 模式角色 - broker- controller- broker,controllernode.id
:节点 ID,需要为每个节点分配一个唯一的 IDcontroller.quorum.voters
:Controller 的投票者配置log.dirs
:日志目录
初始化集群,先生成一个 UUID
./bin/kafka-storage.sh random-uuid
再执行命令,使用生成的 UUID 完成集群初始化
./bin/kafka-storage.sh format-t thCDFveGRleJro7zTaOOGA -c ./config/kraft/server.properties
然后启动 Kafka
./bin/kafka-server-start.sh -daemon ./config/kraft/server.properties
2. Spring Boot 集成
2.1 引入依赖
<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka</artifactId><version>3.1.4</version><exclusions><exclusion><groupId>org.apache.kafka</groupId><artifactId>kafka-clients</artifactId></exclusion></exclusions></dependency><dependency><groupId>org.apache.kafka</groupId><artifactId>kafka-clients</artifactId><version>3.7.0</version></dependency></dependencies>
2.2 配置文件
spring:kafka:bootstrap-servers: 127.0.0.1:9092consumer:group-id: fable-group
2.3 生产者
使用
KafkaTemplate
实现消息的生产
importorg.springframework.beans.factory.annotation.Autowired;importorg.springframework.kafka.core.KafkaTemplate;importorg.springframework.web.bind.annotation.GetMapping;importorg.springframework.web.bind.annotation.RestController;@RestControllerpublicclassProducerController{privatefinalKafkaTemplate<String,String> kafkaTemplate;@AutowiredpublicProducerController(KafkaTemplate<String,String> kafkaTemplate){this.kafkaTemplate = kafkaTemplate;}@GetMapping("/send/message")publicStringsendMessage(){
kafkaTemplate.send("test","Hello, Kafka!");return"Message sent successfully";}}
2.4 消费者
添加
@KafkaListener
注解,监听消息
importorg.apache.kafka.clients.consumer.ConsumerRecord;importorg.springframework.kafka.annotation.KafkaListener;importorg.springframework.stereotype.Service;@ServicepublicclassConsumerService{@KafkaListener(topics ="test", groupId ="fable-group")publicvoidlisten(ConsumerRecord<String,String> consumerRecord){System.out.println("Received message: "+ consumerRecord.value());}}
2.5 启动类
添加
@EnableKafka
注解
importorg.springframework.boot.SpringApplication;importorg.springframework.boot.autoconfigure.SpringBootApplication;importorg.springframework.kafka.annotation.EnableKafka;@SpringBootApplication@EnableKafkapublicclassFableApplication{publicstaticvoidmain(String[] args){SpringApplication.run(FableApplication.class, args);}}
2.6 测试
访问
/send/message
接口,可以看到控制台打印出接收到的消息
Received message: Hello, Kafka!
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